Well, if you cite evidence for something, than you're giving credit to, whoever / whatever you got that information from. If you give the responsibility of a job well done to someone who ISN'T you, than isn't that a form of honesty? If you credit something wrongly, than you're not being COMPLETELY HONEST, now are you? Whether it was an accident or not, it is still a little bit of untruth, isn't it? If you cite, or credit something EXACTLY, it shows that you are an honest person.